Re: [PATCH 05/33] sched/isolation: Save boot defined domain flags

Waiman Long
2025-12-25T22:28:02Z

On 12/24/25 8:44 AM, Frederic Weisbecker wrote:
> HK_TYPE_DOMAIN will soon integrate not only boot defined isolcpus= CPUs
> but also cpuset isolated partitions.
>
> Housekeeping still needs a way to record what was initially passed
> to isolcpus= in order to keep these CPUs isolated after a cpuset
> isolated partition is modified or destroyed while containing some of
> them.
>
> Create a new HK_TYPE_DOMAIN_BOOT to keep track of those.
>
> Signed-off-by: Frederic Weisbecker <frederic@kernel.org>
> Reviewed-by: Phil Auld <pauld@redhat.com>
> ---
> include/linux/sched/isolation.h | 4 ++++
> kernel/sched/isolation.c | 5 +++--
> 2 files changed, 7 insertions(+), 2 deletions(-)
>
> diff --git a/include/linux/sched/isolation.h b/include/linux/sched/isolation.h
> index d8501f4709b5..109a2149e21a 100644
> --- a/include/linux/sched/isolation.h
> +++ b/include/linux/sched/isolation.h
> @@ -7,8 +7,12 @@
> #include <linux/tick.h>
>
> enum hk_type {
> + /* Revert of boot-time isolcpus= argument */
> + HK_TYPE_DOMAIN_BOOT,
> HK_TYPE_DOMAIN,
> + /* Revert of boot-time isolcpus=managed_irq argument */
> HK_TYPE_MANAGED_IRQ,
> + /* Revert of boot-time nohz_full= or isolcpus=nohz arguments */
> HK_TYPE_KERNEL_NOISE,
> HK_TYPE_MAX,
>

"Revert" is a verb. The term "Revert of" sound strange to me. I think
using "Inverse of" will sound better.

Cheers,
Longman